T-slot bar.



G. H.`VNNG. T-SLOT BAR.

APPLICATION FILED APR. 22,1907.

Patented Aug. I?, 1909.

Winesses Im/672%? UMTED STATES GEORGE VINING, OF KANSAS CITY, MISSOURI.`

. T-SLOT BAR.

Specification of Letters Patent'.

Application led April 22, 1907. Serial No. 369,560.

To all whom it may concern:

Be it known that I, GEORGE H. VINING, a citizen of the United States, residing at Kansas City,

useful T-Slot Bar, of which the following is a specification.

M v invention relates to a new and useful article of manufacture; and my object is to supply the trade with T-slots of any desired configuration in cross-section, at much lower cost than they can be cut with the machinery now: employed ,for this purpose.

One of the most diiiicult and expensive jobs encountered in machine-shop practice is that of cutting T-slots and the difficulties increase with the length and smallness of the slot. For instance', ifa long slot is desired a proportionate length of time is required to cut it, and if the slot be small in cross-section it is ditiicult to obtain a cutter of suficient strength to enter the narrow confines of said slot and cut away the material as it advances.

My invention permits of placing T-slots of any desired length, width, or configurationupon the market at small cost, so that the tedious work and expense now involved in cutting out these slots may be avoided.

In order that the invention may be fully understood,reference will now be made to the accompanying drawing, in which Figure l represents a perspective view of the preferred form of my T-slot bar. Fig. 2 is an end view of a modified form of the T-slot bar in position in the table of a machine. Figs. 3 and 4 are cross-sections of modied forms in operative positions..

In carrying out the invention I employ a shell l, consisting preferably of sheet metal which is bent in the form of a T-slot 2 and a pair of pockets 3, which latter are contiguous to the former so that the walls of the pockets will reinforce the walls of the slot. The walls of the slot are further reinforced, when desired, by filling the pockets with Isuitable material 4, which material consists preferably of metal poured into the pockets while in a liquid state. The article is preferably iliade in a long bar which can be cut into suitable Iengtl'ns as required, und sold in the count-y of Jackson and .w btate of Missouri, have invented a. new and over the counters of machine-supply houses,

hardware stores, etc. The outer side walls 5 of the shell are preferably, arranged to slope inwardly and upwardly so that the 4bar may be driven friction-tight into a dove -tail groove, as shown in Fig. 2, and thus avoid the necessity of employing extraneous fastening devices to secure it in an operative position, but as it is easier to cut a' groove with vertical sides provide the forms shown in Figs. 3 and 4, which may be secured in an operative position by screws 6, or strips 7.

Referring in detail to Fig. 2, la designates the shell formed into a circular T-slot 2a and pockets 3a, which latter are filled kwith reinforcing material 4a.

ln the modilied forni Fig. 3, lb designates` the shell formed intol a hexagonal T-slot 2 and pockets 3", which latter are filled with reinforcing material 4b.

The modified form Fig. 4, represents the lshell lc formed into the customary T-slot 2. Two pockets 3c are left between the upper walls of the slot, and a table 8, containing the article, for the reception of strips 7 whereby the article is held in place on the table. Strips 7 preferably consist of metal poured into the pockets while ifn a liquid state,the pockets being' provided with notches 9 for the metal to flow into so that when it congeals it will be reliably secured to the table. For like reasons opening` l0 will be left in the upper'walls of the slot.

My T-slot bar may be applied to a wide range lof machines and mechanical devices constructed of metal or wood, such for instance, as milling machines, planers, lathecarriages, drill-presses, etc.

Haring thus described my invention, what I claim is:-

l. device of the character described, consisting of a shell arranged in the form of a T-slot, and a pocket contiguous to said' slot, the walls of the pocket being arranged to reinforce the walls of the slot.

A device of the character described, cnnsistiug of a shell arranged in the form of a T-slot and pockets contiguous to said slot, and means iu said u'iclets for reinforcing the shell. i

:Patented Aug. 17; .1909., i

3. A device of the 'character' described, coninwardly and upwardly to enter e. dovetaled sisting of a' shell arranged in the form' of a groove.' 1G 'If-slot, and exterior reinforcing means for In testimony whereof I afX lnyslgnature,

Stfening the Walls of said T-slot. in the presence of two Witnesses.

4. A device of the-character desorbed,con Gr. H. VINING. sistng of a shell arranged in the form of. a Witnesses: -Ts1ot and pockets contiguous to the. sides of F. G. FISCHER,"

the T-'s1ot, the sides of said pockets sloping i M. COX. 

